linux释放内存

free -m 查看

/bin/sync

/bin/echo "1">/proc/sys/vm/drop_caches

/bin/echo 2 > /proc/sys/vm/drop_caches

/bin/echo 3 > /proc/sys/vm/drop_caches

http://blog.chinaunix.net/uid-14214482-id-3050296.html